T
treez
Guest
Hello,
I need the following differential amplifier to provide a gain of 18 on the voltage across the series current sense resistor.
(the diff amp resistors are 1K’s and 18K’s)
In steady state, the voltage across the (0.0876R) current sense resistor will be 0.1V.
Schematic with differential amplifier….
https://i50.tinypic.com/15ciz4i.jpg
The opamp’s supply voltage is 10V, and the voltage source at the left hand side of the schematic is 3.6V DC….(with battery internal resistance of 0.06R)
Do you think this will be badly inaccurate?
Will I suffer from common mode effects
Do I need to take measures to fight the input bias current of the differential ampifier
The Opamp in the schematic is LT1006, but in the real circuit I will uise the cheap LM358.
LM358 DATASHEET
https://www.ti.com/lit/ds/symlink/lm358.pdf
I need the following differential amplifier to provide a gain of 18 on the voltage across the series current sense resistor.
(the diff amp resistors are 1K’s and 18K’s)
In steady state, the voltage across the (0.0876R) current sense resistor will be 0.1V.
Schematic with differential amplifier….
https://i50.tinypic.com/15ciz4i.jpg
The opamp’s supply voltage is 10V, and the voltage source at the left hand side of the schematic is 3.6V DC….(with battery internal resistance of 0.06R)
Do you think this will be badly inaccurate?
Will I suffer from common mode effects
Do I need to take measures to fight the input bias current of the differential ampifier
The Opamp in the schematic is LT1006, but in the real circuit I will uise the cheap LM358.
LM358 DATASHEET
https://www.ti.com/lit/ds/symlink/lm358.pdf
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